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/*
* Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @key headful
* @bug 8040076
* @summary AwtList not garbage collected
* @run main/othervm -Xmx100m AwtListGarbageCollectionTest
*/
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.lang.ref.WeakReference;
public class AwtListGarbageCollectionTest {
public static void main(String[] args) {
Frame frame = new Frame("List leak test");
try {
test(frame);
} finally {
frame.dispose();
}
}
private static void test(Frame frame) {
WeakReference<List> weakListRef = null;
try {
frame.setSize(300, 200);
frame.setVisible(true);
List strongListRef = new List();
frame.add(strongListRef);
strongListRef.setMultipleMode(true);
frame.remove(strongListRef);
weakListRef = new WeakReference<List>(strongListRef);
strongListRef = null;
//make out of memory to force gc
String veryLongString = new String(new char[100]);
while (true) {
veryLongString += veryLongString;
}
} catch (OutOfMemoryError e) {
if (weakListRef == null) {
throw new RuntimeException("Weak list ref wasn't created");
} else if (weakListRef.get() != null) {
throw new RuntimeException("List wasn't garbage collected");
}
}
}
}
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